scotty2000ss

iTrader: (2)

So I'm debating on going from 3:90 275/40/17 to 4:56 275/50/17. My cam would love more gear seeing it makes power to 7k. With 4:56 and a 28" tire I can go up to 128 mph in the 1/4. I'm on the stock 10 bolt with M6 trans and I don't care how weak it's going to make it.

So my question is for the people that have had this combo.

1. What did you like about them
2. What didnt you like about them
3. How are they driving around on the street for a weekend warrior

HCI2000SS

iTrader: (2)

Just my personal opinion scotty, but unless it's a dedicated track car I wouldn't make the jump. I'm not saying it wouldn't be worth something overall (even for a street car) but the time and money to make the switch (plus changing tires) just wouldn't be worth it IMO for a car that's basically a street machine. Just a thought...

Guitar

iTrader: (9)

Put the money towards a 9" instead.

scotty2000ss

iTrader: (2)

Thanks guys. Lots to consider. I'm not set in stone on getting them for the 10 bolt.

Really looking for feedback from people that have had 4:56 in their car at the strip and street.

guppymech

iTrader: (7)

I think it's a question of how good a 28" tire will hook vs. your 25.6" tire as the overall final ratio of the two setups is almost the same, the 275/3.90 final ratio is actually taller of the two.
These ratios give roughly the same overall ratio:
4.10/26"
4.30/27"
4.56/28"
In street trim with275s the 4.56s might be too much. Everything I've read indicates the 28 incher will hook the best.

scotty2000ss

iTrader: (2)

Thanks for the insite. That helped.

If I stayed with the current tires size I'd just about run out of gear in 4th trapping at 116 which is my current trap with 3.90s.

scotty2000ss

iTrader: (2)

Now that I think about it, I'm not sure I can fit a 28" tire.

guppymech

iTrader: (7)

Here's a archived link to the gear calculator at the inactive f-body.org site.
https://web.archive.org/web/20150205...ody.org/gears/
Plug some numbers in it to play around with different tire diameters and gear ratios. There's a lot of guys running 28" tires on 4th gens, they should fit on your car too unless a convertable is different somehow.

I hope the link works as I'm unable to check it now. The link is from this thread.
https://ls1tech.com/forums/racer-s-l...l#post18715053

scotty2000ss

iTrader: (2)

Thanks, I'm not sure because my car is lowered. The previous owner had it lowered. I'm unsure how low it is.

nocooler

iTrader: (5)

Not in a ten bolt....

4.56 and 28' tires are the way to go for drag racing N/A.

Zmg00camaross

iTrader: (11)

I love my 4.56 gear and m6 and 28 inch slicks, going 70 mph down the interstate the rpm were at like 2200 rpm, 1-4 came quick and really have to shift quick. This combo help me to my goal of 10s cam only. I will be re gearing it for nitrous though I do believe.

scotty2000ss

iTrader: (2)

Even if you don't dump the clutch on the launch?

HCI2000SS

iTrader: (2)

I make near 600 hp & tq at the wheels with 4.10's on a stock 10 bolt...I think you be just fine as long as you're easy on it for the most part

scotty2000ss

iTrader: (2)

That's reassuring. I found a place that sells Yukon 4:30's. That may be a better choice for me.

mjs1012

iTrader: (36)

I would put whatever money you'd dump into the 10 bolt and save for a better rear with whatever gears you want. We all know you won't be changing gears and tires to drive it easier lol.

scotty2000ss

iTrader: (2)

Haha. Words of wisdom

Zmg00camaross

iTrader: (11)

I broke my 4:10 10 bolt gears with just banging gears. If you seen how tiny the pinion gear is for 4.56 and 4.30 gears you won't waste the money. It's tiny it breaks.

WVhuggerSS

4.30 geared mwc 9" is where its at.

Tuskyz28

I personally think how the car responds to gearing is in the TOTAL combo....
I have my reasons why I say this. A big cam car like a 240 plus duration ls1 car could really benefit from a 4.57 gear *big cams love gear and lots of rpm and needs the gear to put the car in its "sweetspot".
As mentioned above 1-4 gears would come really fast!!
A LS3/LS7 headed motor I would recommend running lots of gear there too due to the port design. Those big rectangular ports really turn on after 4000 rpm!! (Even a stock 317 head stomps a ls3 in the torque department to 4000 rpm or so) I've noticed those square port motor love life in the high RPM range. Same goes for single plane intakes. Also not to mention stroker motors.
Plus weight should be taken into consideration also. Less weight you got the less gear you can have and still pull killer times at the track.
On the other hand I've seen people run a 4.30 or more gear and the car just falls on it's face or the car just spins instead if actually pulling. More gear is not always better. It's a white M6 Camaro with a 402 Ci motor that weighs over 3700 lbs and pulls the front wheels with 3.90 gears. 60 ft is a 1.5......
Just my Outlook on this but I'm still learning as I all I study is all motor setups

scotty2000ss

iTrader: (2)

Am I seeing this right? 3K + for that rear?